49 lines
2.0 KiB
C++
49 lines
2.0 KiB
C++
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/*
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* Copyright 2019 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "tools/SkSharingProc.h"
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#include "include/core/SkData.h"
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#include "include/core/SkImage.h"
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#include "include/core/SkSerialProcs.h"
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sk_sp<SkData> SkSharingSerialContext::serializeImage(SkImage* img, void* ctx) {
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SkSharingSerialContext* context = reinterpret_cast<SkSharingSerialContext*>(ctx);
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uint32_t id = img->uniqueID(); // get this process's id for the image. these are not hashes.
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// find out if we have already serialized this, and if so, what its in-file id is.
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auto iter = context->fImageMap.find(id);
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if (iter == context->fImageMap.end()) {
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// When not present, add its id to the map and return its usual serialized form.
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context->fImageMap[id] = context->fImageMap.size();
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return img->encodeToData();
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}
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uint32_t fid = context->fImageMap[id];
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// if present, return only the in-file id we registered the first time we serialized it.
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return SkData::MakeWithCopy(&fid, sizeof(fid));
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}
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sk_sp<SkImage> SkSharingDeserialContext::deserializeImage(
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const void* data, size_t length, void* ctx) {
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SkSharingDeserialContext* context = reinterpret_cast<SkSharingDeserialContext*>(ctx);
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uint32_t fid;
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// If the data is an image fid, look up an already deserialized image from our map
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if (length == sizeof(fid)) {
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memcpy(&fid, data, sizeof(fid));
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if (fid >= context->fImages.size()) {
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SkDebugf("We do not have the data for image %d.\n", fid);
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return nullptr;
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}
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return context->fImages[fid];
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}
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// Otherwise, the data is an image, deserialise it, store it in our map at its fid.
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// TODO(nifong): make DeserialProcs accept sk_sp<SkData> so we don't have to copy this.
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sk_sp<SkData> dataView = SkData::MakeWithCopy(data, length);
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const sk_sp<SkImage> image = SkImage::MakeFromEncoded(std::move(dataView));
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context->fImages.push_back(image);
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return image;
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}
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